Evolution (Zoology)

Evolution (Zoology)

Easy Questions

Advanced Zoology

Animal Kingdom
Structural Organisation in Animals
Digestion and Absorption
Breathing and Exchange of Gases
Body Fluids and Circulation
Excretory Products and their Elimination
Locomotion and Movement
Neural Control and Coordination
Chemical Coordination and Integration
Human Reproduction
Human Health and Disease
Biotechnology Principles and Processes
Biomolecules (Zoology)
Evolution (Zoology)
Biotechnology and its Applications
Reproductive Health
  1. Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms, includes








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    ESR, Electron Spin Resonance measures number of charges occupying deep traps in crystal band gap. Electron Paramagnetic Resonance (EPR) or Electron Spin Resonance (ESR) is a spectroscopic technique which detects species that have unpaired electrons, generally meaning that the molecule in question is a free radical if it is an organic molecule, or that it has transition metal ions if it is an inorganic complex. Because most stable molecules have a closed-shell configuration without a suitable unpaired spin, the technique is less widely used than nuclear magnetic resonance (NMR). The EPR was first discovered in Kazan State University by Soviet physicist Yevgeniy Zavoyskiy in 1944

    Correct Option: C

    ESR, Electron Spin Resonance measures number of charges occupying deep traps in crystal band gap. Electron Paramagnetic Resonance (EPR) or Electron Spin Resonance (ESR) is a spectroscopic technique which detects species that have unpaired electrons, generally meaning that the molecule in question is a free radical if it is an organic molecule, or that it has transition metal ions if it is an inorganic complex. Because most stable molecules have a closed-shell configuration without a suitable unpaired spin, the technique is less widely used than nuclear magnetic resonance (NMR). The EPR was first discovered in Kazan State University by Soviet physicist Yevgeniy Zavoyskiy in 1944

  1. Presence of gills in the tadpole of frog indicates that








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    Amphibians have moved onto terrestrial habitat but they still need to go back to water for reproduction. The presence of gills in tadpole indicate that amphibians have evolved from fishes. Fishes are completely aquatic so the other three options are incorrect.

    Correct Option: D

    Amphibians have moved onto terrestrial habitat but they still need to go back to water for reproduction. The presence of gills in tadpole indicate that amphibians have evolved from fishes. Fishes are completely aquatic so the other three options are incorrect.

  1. de Vries gave his mutation theory on organic evolution while working on:








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    Pisum sativum - Mendel Drosophila melanogaster - T. H. Morgan.

    Correct Option: C

    Pisum sativum - Mendel Drosophila melanogaster - T. H. Morgan.

  1. Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used








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    Adaptation is generally due to selection of pre-existing variations and not due to new mutations or variations. This tends to support Darwin’s theory of natural selection. The basis was proved by replica plating experiment of Joshua Lederberg and Esther Lederberg. A number of sterile agar plates having antibiotic streptomycin were prepared. Bacteria were inoculated on the renicilling plates from the master plate by sterile velvet plate. Most bacterial colonies did not form replicas and inoculum died. Moreover a few colonies survived showing that they were resistant to streptomycin.

    Correct Option: C

    Adaptation is generally due to selection of pre-existing variations and not due to new mutations or variations. This tends to support Darwin’s theory of natural selection. The basis was proved by replica plating experiment of Joshua Lederberg and Esther Lederberg. A number of sterile agar plates having antibiotic streptomycin were prepared. Bacteria were inoculated on the renicilling plates from the master plate by sterile velvet plate. Most bacterial colonies did not form replicas and inoculum died. Moreover a few colonies survived showing that they were resistant to streptomycin.

  1. Which one of the following phenomena supports Darwin’s concept of natural selection in organic evolution?








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    When DDT was sprayed to kill mosquitoes, there were only few mosquitoes which were already resistant to DDT, and hence survived. Most of the mosquitoes which were sensitive to DDT died. Due to differential reproduction the resistant mosquitoes got more chances of reproduction and multiplied. After few generations most of the mosquitoes were resistant. The sensitive were very few. This supports Darwin’s theory of natural selection and survival of the fittest.

    Correct Option: C

    When DDT was sprayed to kill mosquitoes, there were only few mosquitoes which were already resistant to DDT, and hence survived. Most of the mosquitoes which were sensitive to DDT died. Due to differential reproduction the resistant mosquitoes got more chances of reproduction and multiplied. After few generations most of the mosquitoes were resistant. The sensitive were very few. This supports Darwin’s theory of natural selection and survival of the fittest.